<template>
  <div>
    <div class="card" style="margin-bottom: 10px">
      <el-input style = "width:260px; margin-right:10px" v-model=data.name placeholder="请输入课程名称查询" :prefix-icon="Search"/>
      <el-input style = "width:260px; margin-right:10px" v-model=data.no placeholder="请输入课程编号查询" :prefix-icon="Search"/>
      <el-input style = "width:260px" v-model=data.teacher placeholder="请输入任课老师查询" :prefix-icon="Search"/>
      <el-button type="primary" style="margin-left: 10px" @click="load" >查询</el-button>
      <el-button type="info" @click="reset">重置</el-button>
    </div>

    <div class="card" style="margin-bottom: 10px">
      <div style="margin-bottom: 10px">
        <el-button type="primary" @click="handleAdd">新增</el-button>
      </div>

      <div>
        <el-table :data="data.tableData" style="width: 100%">
          <el-table-column prop="id" label="序号" width="70" />
          <el-table-column prop="name" label="课程名称" />
          <el-table-column prop="no" label="课程编号" />
          <el-table-column prop="descr" label="课程描述" />
          <el-table-column prop="times" label="课时" />
          <el-table-column prop="teacher" label="任课老师" />
          <el-table-column>
            <template #default="scope">
              <el-button type="primary" @click="handleEdit(scope.row)">编辑</el-button>
              <el-button type="danger" @click="del(scope.row.id)">删除</el-button>
            </template>
          </el-table-column>
        </el-table>
      </div>

    </div>

    <div class="card">
      <el-pagination v-model:current-page="data.pageNum" v-model:page-size="data.pageSize"
                     @current-change="handelCurrentChange"
                     background layout="prev, pager, next" :total="data.total" />
    </div>

    <el-dialog width="35%" v-model="data.formVisible" title="课程信息 ">
      <el-form :model="data.form" label-width="100px" label-position="right" style="padding-right: 40px">
        <el-form-item label="课程名称" >
          <el-input v-model="data.form.name" autocomplete="off" />
        </el-form-item>
        <el-form-item label="课程编号" >
          <el-input v-model="data.form.no" autocomplete="off" />
        </el-form-item>
        <el-form-item label="课程描述" >
          <el-input v-model="data.form.descr" autocomplete="off" />
        </el-form-item>
        <el-form-item label="课时" >
          <el-input v-model="data.form.times" autocomplete="off" />
        </el-form-item>
        <el-form-item label="任课老师" >
          <el-input v-model="data.form.teacher" autocomplete="off" />
        </el-form-item>
      </el-form>

      <template #footer>
        <span class="dialog-footer">
          <el-button @click="data.formVisible = false">取 消</el-button>
          <el-button type="primary" @click="save">保 存</el-button>
        </span>
      </template>
    </el-dialog>

  </div>
</template>

<script setup>
import { reactive } from "vue";
import { Search } from '@element-plus/icons-vue'
import request from "@/utils/request";
import {ElMessage,ElMessageBox} from "element-plus";

const data = reactive({
  name:'',
  no:'',
  teacher:'',
  tableData:[
    // { id:1 , name:'大学英语', no: '12138', descr:'lxgsb',times:'99节',teacher:'欧阳'},
    // { id:1 , name:'大学数学', no: '66238', descr:'lxgsb',times:'99节',teacher:'欧阳'},
    // { id:1 , name:'追lxg教程', no: '12138', descr:'lxgsb',times:'99节',teacher:'欧阳'},
    // { id:1 , name:'大学日语', no: '12138', descr:'lxgsb',times:'99节',teacher:'欧阳'},
    // { id:1 , name:'大学逃课', no: '12138', descr:'lxgsb',times:'99节',teacher:'欧阳'},
  ],
  total:0,
  pageNum:1,//当前页码
  pageSize:5,//每页个数
  formVisible:false,
  form:{}
})

const load = () => {
  request.get('/course/selectPage', {
    params: {
      pageNum: data.pageNum,
      pageSize:data.pageSize,
      name:data.name,
      no:data.no,
      teacher:data.teacher
    }
  }).then(res => {
    data.tableData = res.data?.list || []
    data.total = res.data?.total || 0
  })
}
//调用方法获取后台数据
load()

const handelCurrentChange = (pageNum) => {
  //翻页时候重新加载
  load()
}
const reset = () => {
  data.name = ''
  data.no = ''
  data.teacher = ''
  load()
}

const handleAdd=()=>{
    data.form={}
    data.formVisible=true
}

//保存信息到后台
const save = () => {
    request.request({
        url:data.form.id ? '/course/update':'/course/add',
        method:data.form.id ? 'PUT':'POST',
        data:data.form
    }).then(res =>{
        if (res.code === '200'){
            load()
            data.formVisible=false//关闭弹窗
            ElMessage.success("操作成功")
        }else {
            ElMessage.error(res.msg)
        }

    })
}

const handleEdit=(row)=>{
    data.form=JSON.parse(JSON.stringify(row))
    data.formVisible=true
}

const del=(id)=>{
    ElMessageBox.confirm('删除数据后无法恢复，你确认要删除信息吗？','删除确认',{type:'warning'}).then(res=>{
        request.delete('/course/delete/'+id).then(res=>{
            if (res.code === '200'){
                load()
                ElMessage.success("操作成功")
            }else {
                ElMessage.error(res.msg)
            }
        })
    }).catch(res=>{
        ElMessage({
            type: 'info',
            message: 'Delete canceled',
        })
    })

}

</script>